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Stock-Based Compensation Plans (Tables)
 6 Months Ended
Jun. 30, 2015
Share-based Compensation [Abstract]  
Schedule of Stock Based Compensation Expense
Stock-based compensation expense consists of the following:
(In millions)
For the Three Months Ended 
 June 30,
 
For the Six Months Ended 
 June 30,
 
2015
 
2014
 
2015
 
2014
Restricted stock
$
0.7

 
$
0.7

 
$
1.7

 
$
1.6

Restricted stock units
1.9

 
2.7

 
5.0

 
6.2

Total
$
2.6

 
$
3.4

 
$
6.7

 
$
7.8